To move something we either push or pull it. A push or pull
is called a force. Force is that which changes or tries to change the state of
rest or uniform motion of a body.

When a football is
kicked, it moves. A moving ball is stopped, using force by hand or leg. We use
force in pulling out a bucket of water from the well, in pushing a trolley, in
lifting a load, in pedalling a bicycle, in hammering a nail etc.,